EP2012437A3 - Method for cancelling a beat frequency in a radio receiver - Google Patents

Method for cancelling a beat frequency in a radio receiver Download PDF

Info

Publication number
EP2012437A3
EP2012437A3 EP08161084A EP08161084A EP2012437A3 EP 2012437 A3 EP2012437 A3 EP 2012437A3 EP 08161084 A EP08161084 A EP 08161084A EP 08161084 A EP08161084 A EP 08161084A EP 2012437 A3 EP2012437 A3 EP 2012437A3
Authority
EP
European Patent Office
Prior art keywords
signal
demodulated
demodulated signal
modulus
determining
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP08161084A
Other languages
German (de)
French (fr)
Other versions
EP2012437B1 (en
EP2012437A2 (en
Inventor
Morgan James Colmer
Martin John Brennan
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Cufer Asset Ltd LLC
Original Assignee
GS IP LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by GS IP LLC filed Critical GS IP LLC
Publication of EP2012437A2 publication Critical patent/EP2012437A2/en
Publication of EP2012437A3 publication Critical patent/EP2012437A3/en
Application granted granted Critical
Publication of EP2012437B1 publication Critical patent/EP2012437B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • H04B1/16—Circuits
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/02—Details
    • H03D1/04—Modifications of demodulators to reduce interference by undesired signals
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/02—Details
    • H03D1/06—Modifications of demodulators to reduce distortion, e.g. by negative feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D1/00—Demodulation of amplitude-modulated oscillations
    • H03D1/22—Homodyne or synchrodyne circuits
    • H03D1/2245—Homodyne or synchrodyne circuits using two quadrature channels
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
    • H03D3/00—Demodulation of angle-, frequency- or phase- modulated oscillations
    • H03D3/007—Demodulation of angle-, frequency- or phase- modulated oscillations by converting the oscillations into two quadrature related signals

Abstract

A method for cancelling a beat frequency in a radio receiver capable of receiving a radio signal, forming a first demodulated signal (8) by mixing a signal derived from the radio signal with a first local oscillator signal (6), and forming a second demodulated signal (9) by mixing a signal derived from the radio signal with a second local oscillator signal (7) having a quadrature relationship with the first local oscillator signal, the method comprising repeatedly performing the steps of:
a. determining the modulus of the first demodulated signal;
b. determining the modulus of the second demodulated signal;
c. comparing the modulus of the first demodulated signal with the modulus of the second demodulated signal;
d. determining a quotient by dividing the greater of the moduli of the first demodulated signal and the second demodulated signal by the lesser of the moduli of the first demodulated signal and the second demodulated signal;
e. determining a cancellation factor having the value of the reciprocal of the cosine of the arctangent of the quotient; and
f. forming a beat cancelled signal by multiplying one of the first and second demodulated signals by the cancellation factor.
EP08161084.2A 2000-05-12 2001-05-14 Method for cancelling a beat frequency in a radio receiver Expired - Lifetime EP2012437B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0011540A GB2362279B (en) 2000-05-12 2000-05-12 Radio receiver
EP01928124A EP1284047B1 (en) 2000-05-12 2001-05-14 Radio receiver

Related Parent Applications (2)

Application Number Title Priority Date Filing Date
EP01928124A Division EP1284047B1 (en) 2000-05-12 2001-05-14 Radio receiver
EP01928124.5 Division 2001-05-14

Publications (3)

Publication Number Publication Date
EP2012437A2 EP2012437A2 (en) 2009-01-07
EP2012437A3 true EP2012437A3 (en) 2009-01-28
EP2012437B1 EP2012437B1 (en) 2013-09-11

Family

ID=32893438

Family Applications (3)

Application Number Title Priority Date Filing Date
EP01928124A Expired - Lifetime EP1284047B1 (en) 2000-05-12 2001-05-14 Radio receiver
EP08161084.2A Expired - Lifetime EP2012437B1 (en) 2000-05-12 2001-05-14 Method for cancelling a beat frequency in a radio receiver
EP08161093A Withdrawn EP2007017A3 (en) 2000-05-12 2001-05-14 Radio Receiver

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP01928124A Expired - Lifetime EP1284047B1 (en) 2000-05-12 2001-05-14 Radio receiver

Family Applications After (1)

Application Number Title Priority Date Filing Date
EP08161093A Withdrawn EP2007017A3 (en) 2000-05-12 2001-05-14 Radio Receiver

Country Status (9)

Country Link
US (2) US7672411B2 (en)
EP (3) EP1284047B1 (en)
JP (1) JP4695323B2 (en)
CN (1) CN100477541C (en)
AT (1) ATE434866T1 (en)
AU (1) AU2001254988A1 (en)
DE (1) DE60139069D1 (en)
GB (3) GB2362279B (en)
WO (1) WO2001086919A2 (en)

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EP1193506A3 (en) * 2000-09-29 2004-07-21 Siemens Aktiengesellschaft Method for sampling a high frequency receiver signal, in particular a high frequency signal of a receiver coil of a magnetic resonance apparatus
JP4525731B2 (en) * 2007-10-29 2010-08-18 カシオ計算機株式会社 Receiver circuit and clock
WO2009081326A1 (en) * 2007-12-20 2009-07-02 Nxp B.V. Device for receiving an rf signal and method for correcting for inaccuracies of a clock circuit specific reference frequency in such a device
US7932775B2 (en) * 2009-02-05 2011-04-26 Mediatek Inc. Digital demodulation device and related method
CN102510264A (en) * 2011-11-08 2012-06-20 东南大学 Digital down converter and its realization method
CN104092491B (en) * 2014-06-23 2016-08-31 中国人民解放军理工大学 Optical-electronic oscillator produces the apparatus and method of optical frequency com
CH712608A1 (en) * 2016-06-27 2017-12-29 Legic Identsystems Ag RFID receiver and method for extracting data bits encoded in a radio signal.
CN111123383B (en) * 2019-12-25 2021-12-28 中国科学院上海微系统与信息技术研究所 Sparse array signal processing method, device, circuit and imaging system

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US4130806A (en) * 1976-05-28 1978-12-19 U.S. Philips Corporation Filter and demodulation arrangement
WO1987001531A1 (en) * 1985-09-03 1987-03-12 Motorola, Inc. Digital radio frequency receiver
GB2231459A (en) * 1989-04-21 1990-11-14 Secr Defence AM interference reduction
WO2000008764A1 (en) * 1998-08-07 2000-02-17 Telefonaktiebolaget Lm Ericsson (Publ) Digital reception with radio frequency sampling

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US4677690A (en) * 1982-01-25 1987-06-30 International Telephone And Telegraph Corporation Baseband demodulator for FM and/or AM signals
US4447814A (en) * 1983-03-07 1984-05-08 Rockwell International Corporation Digital VOR bearing measurement apparatus
GB2176356A (en) * 1985-06-12 1986-12-17 Philips Electronic Associated Method of, and demodulator for, digitally demodulating an ssb signal
GB8604981D0 (en) * 1986-02-28 1986-04-09 Mcgeehan J P Data transmission
US4750214A (en) * 1986-06-11 1988-06-07 Rockwell International Corporation Digital FM demodulator using delayed signal product with arctangent
EP0310960A3 (en) * 1987-10-05 1990-04-25 Advantest Corporation Digital lock-in amplifier
GB2215945A (en) * 1988-03-26 1989-09-27 Stc Plc Digital direct conversion radio
JPH04123555A (en) * 1990-09-14 1992-04-23 Fujitsu Ltd Data demodulation circuit
US5222144A (en) * 1991-10-28 1993-06-22 Ford Motor Company Digital quadrature radio receiver with two-step processing
JP3117279B2 (en) * 1992-05-08 2000-12-11 アルパイン株式会社 AM radio receiver
JP2982567B2 (en) * 1993-07-20 1999-11-22 松下電器産業株式会社 Receiver
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US5805579A (en) * 1996-05-06 1998-09-08 At&T Corp Symbol switching of CDMA channels
US6067329A (en) * 1996-05-31 2000-05-23 Matsushita Electric Industrial Co., Ltd. VSB demodulator
US6005894A (en) * 1997-04-04 1999-12-21 Kumar; Derek D. AM-compatible digital broadcasting method and system
CN1202050A (en) * 1997-06-09 1998-12-16 株式会社鹰山 Spread spectrum communication method and system
US5952947A (en) * 1997-09-09 1999-09-14 Raytheon Company Flexible and programmable delta-sigma analog signal converter
US6356598B1 (en) * 1998-08-26 2002-03-12 Thomson Licensing S.A. Demodulator for an HDTV receiver
US6005506A (en) * 1997-12-09 1999-12-21 Qualcomm, Incorporated Receiver with sigma-delta analog-to-digital converter for sampling a received signal
US20010040930A1 (en) * 1997-12-19 2001-11-15 Duane L. Abbey Multi-band direct sampling receiver
KR100299139B1 (en) * 1997-12-31 2001-11-14 윤종용 Decimation filter and method for the same
US6243430B1 (en) * 1998-01-09 2001-06-05 Qualcomm Incorporated Noise cancellation circuit in a quadrature downconverter
US6324559B1 (en) * 1998-10-16 2001-11-27 Telefonaktiebolaget Lm Ericsson (Publ) Odd-transform fast convolution
GB2344263B (en) * 1998-11-28 2003-07-02 Matra Marconi Space Uk Ltd Digital signal processing apparatus
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Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4130806A (en) * 1976-05-28 1978-12-19 U.S. Philips Corporation Filter and demodulation arrangement
WO1987001531A1 (en) * 1985-09-03 1987-03-12 Motorola, Inc. Digital radio frequency receiver
GB2231459A (en) * 1989-04-21 1990-11-14 Secr Defence AM interference reduction
WO2000008764A1 (en) * 1998-08-07 2000-02-17 Telefonaktiebolaget Lm Ericsson (Publ) Digital reception with radio frequency sampling

Also Published As

Publication number Publication date
GB0413485D0 (en) 2004-07-21
GB0422393D0 (en) 2004-11-10
EP2007017A1 (en) 2008-12-24
WO2001086919A2 (en) 2001-11-15
DE60139069D1 (en) 2009-08-06
EP2007017A3 (en) 2011-10-05
GB2362279A (en) 2001-11-14
EP2012437B1 (en) 2013-09-11
CN100477541C (en) 2009-04-08
EP2012437A2 (en) 2009-01-07
AU2001254988A1 (en) 2001-11-20
US7672411B2 (en) 2010-03-02
USRE45443E1 (en) 2015-03-31
US20040091062A1 (en) 2004-05-13
CN1436405A (en) 2003-08-13
EP2007017A9 (en) 2011-09-28
JP2003533133A (en) 2003-11-05
ATE434866T1 (en) 2009-07-15
JP4695323B2 (en) 2011-06-08
GB2403612A (en) 2005-01-05
GB2362279B (en) 2004-12-29
GB0011540D0 (en) 2000-06-28
GB2403612B (en) 2005-02-16
WO2001086919A3 (en) 2002-10-17
GB2399470A (en) 2004-09-15
GB2399470B (en) 2004-12-29
EP1284047B1 (en) 2009-06-24
EP1284047A2 (en) 2003-02-19

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